blob: 8b391cd95d7f78c1fb4d348a6d71a119e6ae7b14 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
#![feature(box_patterns)]
#![feature(box_syntax)]
#![allow(dead_code)]
#![allow(unused_variables)]
#![deny(unreachable_patterns)]
enum IntList {
Cons(isize, Box<IntList>),
Nil
}
fn tail(source_list: &IntList) -> IntList {
match source_list {
&IntList::Cons(val, box ref next_list) => tail(next_list),
&IntList::Cons(val, box IntList::Nil) => IntList::Cons(val, box IntList::Nil),
//~^ ERROR unreachable pattern
_ => panic!()
}
}
fn main() {}
|
